/// <summary>
/// Try to load a native library by providing the full path including the file name of the library.
/// </summary>
/// <returns>True if the library was successfully loaded or if it has already been loaded.</returns>
static bool TryLoadFile(string directory, string relativePath, string fileName)
{
lock (StaticLock)
{
if (NativeHandles.Value.TryGetValue(fileName, out IntPtr libraryHandle))
{
return(true);
}
var fullPath = Path.GetFullPath(Path.Combine(Path.Combine(directory, relativePath), fileName));
if (!File.Exists(fullPath))
{
// If the library isn't found within an architecture specific folder then return false
// to allow normal P/Invoke searching behavior when the library is called
return(false);
}
#if NET5_0_OR_GREATER
try
{
if (!NativeLibrary.TryLoad(fullPath, out libraryHandle) || libraryHandle == IntPtr.Zero)
{
return(false);
}
}
catch
{
return(false);
}
NativeHandles.Value[fileName] = libraryHandle;
return(true);
#else
try
{
// If successful this will return a handle to the library
libraryHandle = IsWindows ? WindowsLoader.LoadLibrary(fullPath) : IsMac?MacLoader.LoadLibrary(fullPath) : LinuxLoader.LoadLibrary(fullPath);
}
catch (Exception e)
{
LastException = e;
return(false);
}
if (libraryHandle == IntPtr.Zero)
{
int lastError = Marshal.GetLastWin32Error();
var exception = new System.ComponentModel.Win32Exception(lastError);
LastException = exception;
return(false);
}
LastException = null;
NativeHandles.Value[fileName] = libraryHandle;
return(true);
#endif
}
}
/// <summary>
/// Try to load a native library by only the file name of the library.
/// </summary>
/// <returns>True if the library was successfully loaded or if it has already been loaded.</returns>
static bool TryLoadDirect(string fileName)
{
lock (StaticLock)
{
if (NativeHandles.Value.TryGetValue(fileName, out IntPtr libraryHandle))
{
return(true);
}
#if NET5_0_OR_GREATER
try
{
if (!NativeLibrary.TryLoad(fileName, out libraryHandle) || libraryHandle == IntPtr.Zero)
{
return(false);
}
}
catch
{
return(false);
}
NativeHandles.Value[fileName] = libraryHandle;
return(true);
#else
try
{
// If successful this will return a handle to the library
libraryHandle = IsWindows ? WindowsLoader.LoadLibrary(fileName) : IsMac?MacLoader.LoadLibrary(fileName) : LinuxLoader.LoadLibrary(fileName);
}
catch (Exception e)
{
LastException = e;
return(false);
}
if (libraryHandle == IntPtr.Zero)
{
int lastError = Marshal.GetLastWin32Error();
var exception = new System.ComponentModel.Win32Exception(lastError);
LastException = exception;
return(false);
}
LastException = null;
NativeHandles.Value[fileName] = libraryHandle;
return(true);
#endif
}
}